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Old 5th December 2013, 06:25 AM   #2141
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Quote:
Originally Posted by quanghao View Post
I open GR for PCB LL1684 in this :
Interest list for LL1684 PCB SET (2 channels):

1. NicMac, 1 set (possibly also the transformers)
2. palmito, 1 set
3. Misterwolf, 1 set
4. rredline, 1 set
5. audiodesign, 1 set
......

In about 15 days to complete PCB!

Thanks for your interest!

Super V/i converted (LL1684 )

thank all!
quanghao
1. NicMac, 1 set (possibly also the transformers)
2. palmito, 1 set
3. Misterwolf, 1 set
4. rredline, 1 set
5. audiodesign, 1 set
6. Claudio M. 1 set
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Old 5th December 2013, 06:41 AM   #2142
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Quote:
Originally Posted by audiodesign View Post
The price of the new modules are in the new group buy
DAC-END R (ES9018) full assembled board - version 2
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Old 12th December 2013, 05:55 PM   #2143
gjorgji is offline gjorgji  Canada
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Join Date: Feb 2007
Location: Richmond Hill
Quote:
Originally Posted by audiodesign View Post
After receiving the final version of DAC modules we have detected a very little oscillations on shunt regulators in high frequency range (about 150KHz).

Measurements and simulations made with the collaboration of CAAD allowed to find a simple solution to this problem.

To make this modifications are not necessarily required SMD components but if you want to use SMD and you have problems to find these components you can ask to Quang Hào.

1) Remove R9 on op-amp modules (as suggested before)
2) Remove R10 on op-amp modules (as suggested before)

The following modification must only be made only on +1.2V , +3,3V and +15V shunt regulators.

3) Add 100n X7R as described on attached pic -->All are X7R (better dialectric compared to U5r , Z5R etc)
4) Add 1uF X7R as described on attached pic -->All are X7R (better dialectric compared to U5r , Z5R etc)

These modifications also will reduce the temperature on the shunt of the op-amp module.

The modification as been applied on the last DAC modules sent.

See the image created by CAAD.
Hi Andrea,

Will you know the mouser/digikey part# for those caps(X7R) ? I am ordering the LMV7219 so will like to get the caps also.

Thanks,
Gjorgji
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Old 1st January 2014, 02:49 PM   #2144
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Join Date: Mar 2007
Default Using BuffaloIII for Opamp I/V

Have aprox 30 mvdc out using 27 ohm I/V resistors. Anything to do about that ? I think I will try 18 pf silver Mica after each 470 ohm resistors ( R2 , R 3)
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Old 1st January 2014, 04:00 PM   #2145
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18 pf did not help at all.
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Old 18th January 2014, 12:56 AM   #2146
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Join Date: Dec 2010
Location: Britain (Rennes)
Default The spdif issue

Hello All,

I recieve my dac few days ago
starting to lisntenig it...
but some "glitch" and LOCK problems :

I have 2 cables : 1 metter standard grade
5 m hq grade

- with the 1m random glitch/lock desepear (depends use of computer, even plug/unplug soldering iron)
- wtih the 5m same "glitch" and lost of signal for 1s (the 2 leds light off for 1/2s)

I look the posts ;
So , I had put the 100nf cap
=> its solved my "lost of signal" => it's work like the 1m
I have always the glitch/lock, more frequent at >44khz

So I need to change the LMV7219 ??!

Thanks for advice
julien

Last edited by juju35135; 18th January 2014 at 01:11 AM.
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Old 18th January 2014, 04:30 AM   #2147
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Hi!
you dac not need mode all, I was fix all!

220V voltage need to be connected to the earth, see photos
thanks
Attached Images
File Type: jpg plug-connections_001.jpg (52.7 KB, 560 views)
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Group buy DAC-END R (ES9018) full assembled board
update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
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Old 14th February 2014, 01:04 PM   #2148
kmajjo is offline kmajjo  France
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Join Date: Dec 2009
Location: France
Default First version DAC board

Hello all,
If somebody have a first version DAC board (no power and output needed) to sell , please contact me.
Br
Jacky
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Old 22nd February 2014, 09:59 PM   #2149
judo is offline judo  Hungary
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Join Date: Oct 2003
Location: hungary
Quote:
Originally Posted by rredline View Post
I use this PIC programmer to upgrade the firmware, cheaper than Pick-It.
Search in eBay or Aliexpress for "K150 PICPRO", it costs about $12.67.
It is made by BAITE and uses FTDI USB-Serial chip.

A side note, on my system, after the programming status bar reach 100%, somehow it pauses for about 8 minutes before the "Successful" prompt appeared, it works though, so be patience if this occurred.

I have uploaded the driver, programming software and a simple tutorial here:
BAITE K150 PICPRO Programmer Drv & SW.zip
Thank you for the tip and the tutorial, it was very useful.
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Old 10th April 2014, 06:41 AM   #2150
michyy is offline michyy  Belarus
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Join Date: Jul 2013
Hey. So hooked to 220 -
DAC-END R (ES9018) full assembled board.

Voltage on white and yellow = 36v
on blue and green = 6v .
Is it possible to connect white and yellow on plate 18v ???
Thank you !
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